Last modified by adavison on 2022/10/04 13:53
From version 22.4
edited by shailesh
on 2021/10/06 14:47
Change comment: There is no comment for this version
To version 22.8
edited by shailesh
on 2021/10/07 10:56
Change comment: There is no comment for this version

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77 77  
78 78  Next we shall create a virtual environment within this directory. Python 3 provides intrinsic support for creating virtual environments. Since Python 3.6, the recommended method of creating a new virtual environment is as follows:
79 79  
80 +(% class="box errormessage" %)
81 +(((
82 +**Note:**
83 +For older versions of Python 3, you might require to manually install `python3-venv` package before being able to run the below command. To install, run:
84 +\\sudo apt-get install python3-venv
85 +\\More recent versions of Python 3 (e.g. v3.9) already have this pre-installed.
86 +)))
87 +
80 80  (% class="box infomessage" %)
81 81  (((
82 82  **Screencast** - terminal
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115 115  
116 116  This will install Brian2, along with all its dependencies such as 'cython', 'numpy', etc. We can now go back into our virtual environment's 'site-packages' directory to see how it is now populated with all these packages.
117 117  
126 +(% class="box infomessage" %)
127 +(((
128 +**Screencast** - file explorer
129 +\\(% style="color:#000000" %)<< show directory contents lib/python3.9/site-packages >>
130 +)))
131 +
118 118  To confirm that we have properly installed Brian2 on our computer, we can test as follows:
119 119  
120 120  (% class="box infomessage" %)
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122 122  **Screencast** - terminal
123 123  \\(% style="color:#000000" %)python
124 124  \\import brian2
125 -brian2.test()
139 +\\exit()
126 126  )))
127 127  
142 +If there are no error messages here, and the import is successful, then we have completed installing Brian2.
143 +
144 +
145 +We shall now move on to install the NEST simulator. Unlike Brian2, NEST is not a Python package and therefore its installation is a bit more involved. We shall install the NEST module along with PyNEST, which is a Python interface for controlling the NEST kernel.
146 +
147 +We first install the NEST module. Version 2.20 is currently supported by PyNN, and it is likely that other versions of NEST might have issues when used with the current version of PyNN. The installation is done by first adding the PPA repository for NEST and updating apt, followed by the installation of NEST itself.
148 +
128 128  (% class="box infomessage" %)
129 129  (((
130 -**Screencast** - file explorer
131 -\\(% style="color:#000000" %)<< show directory contents lib/python3.9/site-packages >>
151 +**Screencast** - terminal
152 +\\(% style="color:#000000" %)sudo add-apt-repository ppa:nest-simulator/nest
153 +sudo apt-get update
154 +\\sudo apt-get install nest
132 132  )))
133 133  
157 +At this point, we have installed the NEST module, but it is still not usable via Python. To do so, we next install PyNEST.
158 +
159 +
160 +
134 134  (% class="box successmessage" %)
135 135  (((
136 136  **Slide** recap of learning objectives